<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRole">添加角色</el-button>
        </el-col>
      </el-row>
      <!--角色列表区域-->
      <el-table :data="roleList" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--渲染二级和三级权限-->
              <el-col :span="19">
                <!--通过for循环渲染二级权限-->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="item3 in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row, item3.id)">
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column label="#" type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)"></el-button>
            <el-button type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)"></el-button>
            <el-button type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)"></el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--添加角色对话框-->
    <el-dialog title="提示" :visible.sync="addDialogVisible" width="30%" @close="addDialogClosed">
      <!--内容主体区域-->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!--底部按钮区域-->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>
    <!--修改用户的对话框-->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="30%" @closed="editDialogClosed">
      <!--内容主体区域-->
      <el-form ref="editFormRef" :model="editForm" :rules="addFormRules" label-width="100px">
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!--分配权限的对话框-->
    <el-dialog title="分配" :visible.sync="setRightDialogVisible" width="30%" @closed="setRightDialogClosed">
      <!--树形控件-->
      <el-tree :data="rightList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有数据列表
      roleList: [],
      addDialogVisible: false,
      //添加用户的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      //添加用户的表单验证对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '角色名称的长度在3~10之间',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          {
            min: 2,
            max: 30,
            message: '角色描述的长度在2~30之间',
            trigger: 'blur'
          }
        ]
      },
      editDialogVisible: false,
      //编辑的表单
      editForm: {},
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //所有权限的数据
      rightList: [],
      //树形控件的数据绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //默认选中的节点的id值的数组
      defKeys: [],
      //当前即将分配权限的id
      roleId: ''
    }
  },
  created() {
    this.getRoleList()
  },
  methods: {
    //获取所有角色的列表
    async getRoleList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表数据失败')
      }
      this.roleList = res.data
      console.log(this.roleList)
    },
    //添加新的角色
    addRole() {
      this.addDialogVisible = true
    },
    //监听添加用户对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    //点击按钮，添加新角色
    addUser() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        //可以发送网络请求加入角色
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) this.$message.error('添加角色失败')
        this.$message.success('添加角色成功')
        //隐藏添加用户的对话框
        this.addDialogVisible = false
        //重新请求数据
        this.getRoleList()
      })
    },
    //展示用户编辑的对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询角色信息失败')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    //监听编辑表框关闭后的重置
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    //修改用户信息并提交
    editRoleInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        //发去修改用户信息的数据请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) return this.$message.error('更新角色失败')
        //关闭对话框
        this.editDialogVisible = false
        //刷新数据列表
        this.getRoleList()
        //提示修改成功
        this.$message.success('更新角色成功')
      })
    },
    //通过Id删除角色
    async removeRoleById(id) {
      //弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      //如果用户确认删除
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败')
      this.$message.success('删除成功')
      this.getRoleList()
    },
    //通过Id删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该分类, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      //如果用户确认删除
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      this.$message.success('删除权限成功!')
      //重新发起请求，但会导致当前的拓展列被收回
      //this.getRoleList()
      role.children = res.data
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      //获取所有权限列表,API中的type参数可以使用list和tree来显示权限
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据权限失败')
      }
      this.rightList = res.data
      //递归拿到三级权限的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    //通过递归的形式下得到所有三级权限下的id
    getLeafKeys(node, arr) {
      if (!node.children) return arr.push(node.id)
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    //为角色分配权限
    async allotRights() {
      //...将多个数组变成一个数组
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRoleList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
